Molecular dynamics simulation of plastic deformation of nanotwinned copper
文献类型：期刊论文
| 作者 | Cao AJ(曹阿静) ; Wei YG(魏悦广)
|
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 2007 |
| 卷号 | 102期号:8页码:083511 |
| 通讯作者邮箱 | chaoajing@lnm.imech.ac.cn ; ywei@lnm.imech.ac.cn |
| 关键词 | Strain-Rate Sensitivity Nano-Scale Twins Nanocrystalline Metals Dislocations Nucleation Boundaries Mechanism Strength Systems Al |
| ISSN号 | 0021-8979 |
| 通讯作者 | Cao, AJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China. |
| 中文摘要 | The plastic deformation of polycrystalline Cu with ultrathin lamella twins has been studied using molecular dynamics simulations. The results of uniaxial tensile deformation simulation show that the abundance of twin boundaries provides obstacles to dislocation motion, which in consequence leads to a high strain hardening rate in the nanotwinned Cu. We also show that the twin lamellar spacing plays a vital role in controlling the strengthening effects, i.e., the thinner the thickness of the twin lamella, the harder the material. Additionally, twin boundaries can act as dislocation nucleation sites as they gradually lose coherency at large strain. These results indicate that controlled introduction of nanosized twins into metals can be an effective way of improving strength without suppression tensile ductility. (C) 2007 American Institute of Physics. |
| 类目[WOS] | Physics, Applied |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | STRAIN-RATE SENSITIVITY ; NANO-SCALE TWINS ; NANOCRYSTALLINE METALS ; DISLOCATIONS ; NUCLEATION ; BOUNDARIES ; MECHANISM ; STRENGTH ; SYSTEMS ; AL |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000250589300028 |
| 公开日期 | 2009-08-03 ; 2010-06-13 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/33879]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Cao AJ,Wei YG. Molecular dynamics simulation of plastic deformation of nanotwinned copper[J]. Journal of Applied Physics,2007,102(8):083511. |
| APA | 曹阿静,&魏悦广.(2007).Molecular dynamics simulation of plastic deformation of nanotwinned copper.Journal of Applied Physics,102(8),083511. |
| MLA | 曹阿静,et al."Molecular dynamics simulation of plastic deformation of nanotwinned copper".Journal of Applied Physics 102.8(2007):083511. |
入库方式： OAI收割
来源：力学研究所
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